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Article
Impact of Weather Conditions on the Population Dynamics and Reproductive Success of Platanthera bifolia (L.) Rich. in the Komi Republic
The results of an 8-year study of the Platanthera bifolia (L.) Rich. (Orchidaceae) population on the northern border of its range (the Komi Republic, northeast of the European part of Russia) are presented. A neg...
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Article
Impact of Weather Conditions on the Seasonal Development, Population Structure, and Reproductive Success of Dactylorhiza incarnata s. l. (Orchidaceae, Liliopsida) in the Komi Republic
Abstract—The results of our eight-year study of a population of the rare orchid Dactylorhiza incarnata subsp. cruenta at the northern limit of its range (Komi Republic) are presented. The weather factors (air tem...
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Article
Living at the Edge: A Comparative Study of the Central and Marginal Populations of Dactylorhiza traunsteineri (Orchidaceae) in the European Northeast of Russia
Peripheral populations are considered more vulnerable than central ones, but recent studies have questioned the existence of clear patterns within species ranges. We studied reproductive and demographic charac...
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Article
Experimental Determination of the Cathode Spot Motion Parameters during the Operation of a Vacuum-Arc Evaporator with an Arched Magnetic Field
The dependences of the cathode spot velocity and the spot track width on the magnetic field on the cathode surface are determined. The parameters for vacuum arc evaporator cathodes made of a D16, VT1-0, or Ti–...
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Article
Reproductive Success of Dactylorhiza fuchsii (Druce) Soó at the Northern Border of Its Distribution Range
Data on the population structure, morphometric features of plants and seeds, and some features of reproductive biology (fruit set and seed productivity) of Dactylorhiza fuchsii (Druce) Soó (Orchidaceae) on the no...
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Article
Population Structure and Seed Productivity of Dactylorhiza incarnata (L.) Soó (Orchidaceae, Liliopsida) at the Northern Border of Its Habitat
Abstract—Populations of the rare orchid Dactylorhiza incarnata (L.) Soó have been studied at the northern border of the species habitat in the Komi Republic (northeast of European Russia). Data on the population ...
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Article
Reproductive Success of Marginal Populations of Dactylorhiza maculata (L.) Soó (Orchidaceae)
Populations at the border of ranges are considered more vulnerable than those in the center. However, some recent reviews contradict this hypothesis. We have studied the reproductive and demographic characteri...
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Article
Seed Productivity of Epipactis atrorubens (Hoffm.) Besser (Orchidaceae, Liliopsida) on the Northern Border of Its Distribution Range
Orchids, due to their biological features, high decorative properties, and poor resistance to anthropogenic factors, are one of the most vulnerable components in the vegetation of the world. Their conservation...
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Article
Population Dynamics, Reproductive Success, and Seasonal Development of Cypripedium calceolus under Different Growing Conditions as a Response to Weather Factors
The results of a 7-year study of two populations of the rare orchid Cypripedium calceolus L. located in different ecotopes (in the forest and in the swamp) in the Komi Republic are presented. It is revealed that ...
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Article
Effect of Illumination Conditions on the Reproductive Success of Epipactis helleborine (L.) Crantz (Orchidaceae)
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Article
Cathodic Arc Evaporation of Polycrystalline Silicon
The paper presents the experimental results of silicon cathodic arc evaporation in a continuous mode with the superimposed external arched magnetic field. Volt-ampere characteristics are obtained for arc disch...
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Article
Effect of Lighting Conditions on the Reproductive Success of Cypripedium calceolus L. (Orchidaceae, Liliopsida)
Abstract—The influence of lighting conditions on the reproductive characteristics of Cypripedium calceolus L. was studied on the territory of the Komi Republic, where the species is located on the northern border...
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Article
Selection of Materials of Friction Lining Centrifugal Brake Rollers
Abstract—The results of friction-wear tests of rolled friction-polymer materials (FPM) of two types using the operating modes of the friction brake of a centrifugal type roller are presented in this work. The tes...
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Article
Study of the Mechanical Characteristics of Single-Layer and Multilayer Nanostructures Based on Carbon and Fluorocarbon Coatings
The results of studying the nanohardness and Young’s modulus of single-layer and multilayer nanostructured barrier layers prepared by methods of ion-plasma technology on the basis of carbon and fluorocarbon co...
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Article
Characteristics of silicon microdroplets in coatings deposited by vacuum arc evaporation
The current methods of silicon coating deposition use toxic materials or have low growth rates and high energy consumption. Vacuum arc evaporation allows achieving high rates of coating growth along with low e...
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Article
Reproduction biology of Gymnadenia conopsea (L.) R.Br. (Orchidaceae) on its northern distribution border
This article contains data on the reproduction biology of Gymnadenia conopsea (L.) R.Br. (Orchidaceae) in the Komi Republic on the northern border of the habitat of the species. Morphometric characteristics of fl...
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Article
Structure and Features of the Motion of a Cathode Spot on a Continuous Titanium Cathode
High-speed video filming by the VS-FAST-NG CCD-array-based video camera from the firm of Videoskan with speeds of 1000 and 5000 frames per second and exposure time of 1·10−3 and 2·10−4 sec, respectively, is condu...
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Article
Replacement of Electrofilters in an External Cyclone System for Dust Removal from Regeneration Stack Gases on the 1A/1M Unit
Replacement of electrofilters in a external cyclone system for dust removal from regeneration gases on the 1A/1M unit allowed significantly reducing operating costs while maintaining emission of catalyst dust ...
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Article
Modernization of a sulfuric acid alkylation unit
One of the basic processes in production of the components of high-octane unleaded gasolines which satisfy contemporary environmental requirements is sulfuric acid alkylation of isobutane by butylenes. Increas...
